package com.diploma.project.aiqiyi.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpImageByteUtil {

    protected static Logger logger = LoggerFactory.getLogger(HttpImageByteUtil.class);

    /**
     * 根据地址获得数据的字节流
     *
     * @param strUrl 网络连接地址
     * @return
     */
    public static InputStream getImageFromNetByUrl(String strUrl) {
        try {

            URL url = new URL(strUrl);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(5 * 1000);
            logger.info("错误码================" + conn.getResponseCode());
            InputStream inStream = conn.getInputStream();//通过输入流获取图片数据  
            // byte[] btImg = readInputStream(inStream);//得到图片的二进制数据  
            return inStream;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 从输入流中获取数据
     *
     * @param inStream 输入流
     * @return
     * @throws Exception
     */
    public static byte[] readInputStream(InputStream inStream) throws Exception {
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = inStream.read(buffer)) != -1) {
            outStream.write(buffer, 0, len);
        }
        inStream.close();
        return outStream.toByteArray();
    }

}
